GLOSSARY THERMAL/ENERGY EFFICIENT BLINDS Correctly specified and operated blinds can have a significant impact on reducing heat loss in the winter and heat gain in the summer. The energy saving performance of blinds depends on a number of factors, including the type of blind, the fabric or materials used and where the blind is fitted. TIMBER SLATTED BLINDS Timber slatted blinds are one of the earliest forms of sunscreening that were developed from the timber shutters that covered window openings before the advent of glass. The modern blind dates back to the 18th century and is the original venetian blind. Whilst most are made with the same components as aluminium blinds, reproductions of the early blinds with timber rail sections and cast fittings are also available. As a natural material, timber is subject to movement and, for timber blinds, it is only possible to use timbers that are stable in the form of narrow strips. The timber has to be dried to a moisture content of between 6- 8% to maintain this stability and reduce warping to a minimum. The timbers most generally used are western red cedar, basswood and ramin but other timbers can be used in special applications. Cedar is a very grainy wood, with a distinctive variation in colour that is its attraction. Basswood is a light wood with a more even grain, which is preferred when a more even colouring is required, and ramin is a medium grained hardwood. [It should be noted that ramin timber is currently subject to CITES endangered species control and only that from properly certified sources should be used.] Some simulated timber slattings are also available which are, in fact, made from polymers whilst having the appearance of grain and colour of real wood. Types and operation Dual control – dual control blinds have a cord to raise and lower the blind and either a cord or rod to tilt the slats. Mono control – mono control blinds have a cord or rod which both raises and lowers the blind and tilts the slats. Electric control – with motor located in headrail. Rooflight – can also be fitted to rooflights as non-retractable blinds (see page 12) Components Slat – 25mm, 35mm or 50mm widths in cedar, basswood or ramin. Headrail – in steel or wood. Ladder braid – polyester braid with cross ladders to support the slat. Ladder tape – Terylene or cotton in 12mm, 25mm and 38mm widths instead of braid. Cord – polyester. Acorn – wooden, brass, brushed steel, plastic cord pulls. VENETIAN BLINDS Venetian blinds consist of horizontal, overlapping slats which are generally either made of aluminium or timber. The slats are suspended from a headrail and supported by ladder braid or ladder tape. Aluminium slats, for internal use, are available in 15mm or 16mm, 25mm, 35mm, 50mm and 90mm widths. Aluminium slats are also produced in 65mm and 80mm widths primarily for external use but can also be used internally. Timber slats are available in 25mm and 50mm widths. Types and operation Micro blinds – a term used to describe aluminium slat venetian blinds using 15mm or 16mm wide slat. Tilt Shaft Headrail Tilter Bearing Bracket Ladderbraid Acrylic Rod Bottom Rail Dual Control Venetian Blind Ladder Tape Tape Roll Mono Control Venetian Blind Gearbox Mono Cord Control Cord Lock Equaliser Lift Cord Mono Rod Control Mini blinds – a term used to describe aluminium or timber slat venetian blinds using 25mm wide slat. Timber slat is always plain but aluminium can be plain or perforated. Dual control – dual control blinds have a cord to raise and lower the blind and either a cord or rod to tilt the slats. Mono control – mono control blinds have a cord or rod which both raises and lowers the blind and tilts the slats. Electric control – electric operation is available for venetian blinds of all slat sizes. The motor is located in the headrail. Audio visual – provides room darkening effect by increased slat overlap and has channelling to both sides plus top and bottom. Between glazing – special fittings are available allowing blinds to be installed between glazing with remote control facility (see mid-pane blinds). Perforated – aluminium slat available in all slat widths except micro, provides sun screening protection without eliminating the external view. Components Headrail – steel or aluminium encloses the operating mechanism. Bottom rail – steel or aluminium. Slat – aluminium with stove-enamelled paint finish or timber. Ladder braid – polyester braid with cross ladders to support the slat. Ladder tape – woven cotton or Terylene tape in 12mm, 19mm, 25mm and 38mm widths with cross ladder. Cord – polyester. Lift Tape – Terylene or stainless steel tape to raise mono and electric blinds. Rod – acrylic clear wand or steel with PVC sleeving. Cord lock – locking mechanism for the lift cord to secure blind in raised position. Tilter – a geared drive to adjust the slat angle. Acorn – plastic or wood cord pull. VERTICAL LOUVRE BLINDS Vertical louvre blinds consist of two basic elements, a rigid headrail along which travel louvre carriers incorporating rotatable hooks and a set of louvres each of which hangs from one of the hooks. The carriers are connected to each other in such a way that they can be bunched together at one, 14 <strong>Blinds</strong> & <strong>Shutters</strong> <strong>Buyers</strong>’ <strong>Guide</strong> • <strong>2024</strong>
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